The 12H802-1769 engine had a 25MM x 3-5/32" shaft with a 1/4" keyway and 2 woodruff keyways and a 3/8 # 24 bolt on the end of the shaft. Please note: This mower also used a Briggs 12h802-1764 engine that had a 7/8" diameter shaft 3-5/32" long with a 3/16" keyway and 2 woodruff keys. You will need to measure your shaft before ordering.
